Melhoria da qualidade de uva 'Bordô' para produção de vinho e suco de uva

Aiming the production of wine and grape juice of better quality, the objective of this study was to increase the ratio of total soluble solids / titratable acidity (TSS / TA), known as flavor, of the grape 'Bordo' by the use of plant growth regulators and to evaluate the effects of these products on the other chemical and physical characteristics of the fruit. The work was conducted during two crop seasons, 2009/2010 and 2010/2011 in Bocaiuva do Sul, PR, Brazil. The physical variables analyzed were: length and width of clusters, berries diameter, number of berries per cluster, cluster and berries weight, and number of seeds per berry. The chemical variables were: soluble solids (TSS), titratable acidity (TTA), pH and TSS / TTA. The application of GA3 at 100 mg L-1 provided the improvement of fruit quality for wine and grape juice production, as well as the improvement of fruits development.